234 



E. A. WALFORD ON THE " NORTHAMPTON" SAND 



top of the Upper Lias, whilst the banks above the stream are strewn 

 with fragments and ordinary fossils of the Clypeus-grit, with which 

 are pieces of limestone conglomerate, containing Monilivaltia lens 

 and Pecten personatus, together with compact and sandy lime- 

 stones, with Myiilus Sowerbyanus, Avicula Munsteri, &c, forms 

 common to the lower beds of the Ho ok- Norton area. Pecten perso- 

 natus occurs abundantly at the base of the Parlcinsoni-zone near 

 Notgrove. Superimposed beds of the fawn-coloured oolitic sandy 

 limestones can be traced in the crest of the slope, in the roadside 

 quarries, and in the quarry on the Bright-Hill road. A fault cross- 

 ing the district from N.E. to S.W. has fortunately caused the preser- 

 vation of the higher beds which the railway has intersected. A 

 detailed section has been given by Mr. Beesley*, and a summarized 

 section by Mr. Hudlestont. In the railway- cutting the fawn- 

 coloured limestones (E) are shown in the excavation for the piers of 

 the bridge, covered elsewhere by 8 feet of hard crystalline limestone- 

 grits, composed of rolled fragments of shells andspinesof Echinoderms, 

 quartz, and oolitic grains, but containing few recognizable fossils. 

 Upon these rests a bed of whitish, compact, fine-grained mortar-like 

 limestone, with shells in very indifferent preservation and a few 

 plant-remains. Mr. Beesley, prior, however, to the discovery of any 

 recognizable fossils, suggested its affinity with the Lincolnshire 

 Limestone, supposing it to bo inferior to the Clypeus-grit, which 

 appears hereabouts to be at the base of the Inferior Oolite of this 

 district. Fortunately, since Mr. Beesley's paper was written, the 

 diligent work of Mr. J. Windoes has been rewarded by the accumu- 

 lation of the following fossils, to which I have been able to add 

 a few species. Those marked i are from the gritty limestones 

 (Chipping-Norton limestones), the others from the mortar-like bed. 



Saurian tooth. 



Nerinosa Eudesii, M. <$• L. 

 JNerinsea, smooth sp. 

 JNerinsea. 



Nerinaja, several forms. 

 jNerita rugosa, M. § L. 



Turbo paludinasfbrmis. 



Turbo, small sp. 



Solarium, small sp. 



Cerithium limaeforme ?, Boon. 

 {Pleurotomaria, nov. sp. 

 jActaaonina, several forms. 



JLeda, sp. 

 JOpis similis, Sow. 

 JLima cardiiformis, Sow. 

 JAvicula costata, Sow. 



Astarte. 

 JPlacunopsis socialis, M. Sf L. 

 JPentacrinites. 

 JSpines of Oidans. 

 |Acrosalenia. 

 {Plates of Starfish. 



Plant-remains. 



Immediately below the black clay, the base of the Great Oolite, 

 is a layer of red and black sand with occasionally blocks of traver- 

 tine-like stone, which I have noted as occupying a similar position 

 at Swerford and also around the slope of Bright Hill towards Long 

 Compton. These are suggestive of great waste towards the close of 

 the Bajocian period ; for, capped as the blocks are with marls and 



* Proc. Geol. Assoc, vol. v. p. 15. 

 t Ibid. p. 3. 



